1. Requires Windows system for custom settings 2. Supports hot swap 3. Four sets of definitions can be set and switched freely 4. Axis switch color: blue 5. This is a mini keyboard with custom functions, designed for use in design, stock, office, gaming, music, media, industrial control, testing, and other applications 6. Supports one-key copy and paste 7. Wired Type-C interface, no driver required, plug and play 8. Metal knob for one-handed control of track navigation, volume adjustment, playback, previous track, next track, zoom in/out, previous page, and next page Common troubleshooting: Problem 1: No response when the keyboard is connected to the computer, or the device prompts an error Solution: Check if the cable and interface are properly connected, then unplug and reconnect; try a different USB port on the computer Problem 2: Custom software cannot be opened after download Solution: Check if the software is blocked by system security settings and set it as a trusted file Problem 3: Why does the button or knob continuously output "a" after connecting to the computer? Solution: Outputting "a" is the default factory setting; open the custom software to redefine the button functions Color: black Material: ABS + Acrylic + Metal Size: 8.7 x 5.7 x 4 cm Package Contents: 1 x keyboard 1 x USB data cable 1 x USB adapter 1 x instruction manual in Chinese and English Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the photo and the actual product. Measurement error allowed is +/- 1-3 cm